(a) The student places a transparent block ABCD on the ray-trace sheet, as indicated in Fig. 3.1. She draws a line NM. (1) • Draw a normal to line AB at point N. The normal should start above AB and extend below AB so that it crosses line CD. • Label the point at which the normal crosses CD with the letter L. (ii) Measure the angle e between the normal and line NM. .............. (b) The student places two pins P, and P2 on line NM, a suitable distance apart.

The radius of curvature of a spherical convex miror is 20 cm. 1) Describe the image formed when a 10-cm tall object is positioned 50 cm from the mirror. Calculate the image distance dI. Follow the sign convention. (Express yor answer to two significant figures). 2) Calculate the image height and describe the orientation. (Express yor answer to two significant figures). 3) Describe the image formed when a 10-cm tall object is positioned 100 cm from the mirror. Calculate the image distance dI. Follow the sign convention. (Express yor answer to two significant figures). 4) Is the image real or virtual? 5) Calculate the image height and describe the orientation. (Express yor answer to two significant figures).

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